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Airmar Wrench F/ B75 Ss75 75WR-4

75WR-4 Transducer Housing WrenchA single-handed wrench that holds the main thru-hull housing via the ‘wrench flats’ on the side of the housing to facilitate tightening of the hull nut. Use wrench 75WR-2 or 75WR-3 for the hull nut.For use with:B75SS75